These pictures of Atari 8-Bit hardware were included on the Atari POOLDISK 1.0 CD-ROM and are in the public domain. They were on the CD-ROM in .PCX format, dated 1995, and converted to .PNG by Kevin Savetz in 2015. The resolution is pretty low, I suppose due to the nature of digital cameras in 1995.
I am also uploading the original .PCX files in a .ZIP, though I'm not sure why you'd need them.
The description in the pictures directory says: "In this directory, you see our collection of Atari hardware. We also digitized some flyers Atari used to distribute. We've also included the hardware we've used to produce the "POOLDISK" CD."
The pictures include some rare Atari hardware including the Atari 815 disk drive, Atari 800XE computer, Atari 1400 XL, Atari 1450XLD, Atari XL Expansion Box, and more.
The photos were perhaps taken by Bo Schreurs of The Netherlands, creator of POOLDISK 1.0.